<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2018 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
declare(strict_types=1);

namespace Fisharebest\Webtrees;

/**
 * A GEDCOM note (NOTE) object.
 */
class Note extends GedcomRecord
{
    const RECORD_TYPE = 'NOTE';
    const ROUTE_NAME  = 'note';

    /**
     * Get an instance of a note object. For single records,
     * we just receive the XREF. For bulk records (such as lists
     * and search results) we can receive the GEDCOM data as well.
     *
     * @param string      $xref
     * @param Tree        $tree
     * @param string|null $gedcom
     *
     * @throws \Exception
     *
     * @return Note|null
     */
    public static function getInstance(string $xref, Tree $tree, string $gedcom = null)
    {
        $record = parent::getInstance($xref, $tree, $gedcom);

        if ($record instanceof Note) {
            return $record;
        }

        return null;
    }

    /**
     * Get the text contents of the note
     *
     * @return string
     */
    public function getNote()
    {
        if (preg_match('/^0 @' . Gedcom::REGEX_XREF . '@ NOTE ?(.*(?:\n1 CONT ?.*)*)/', $this->gedcom . $this->pending, $match)) {
            return preg_replace("/\n1 CONT ?/", "\n", $match[1]);
        }

        return '';
    }

    /**
     * Each object type may have its own special rules, and re-implement this function.
     *
     * @param int $access_level
     *
     * @return bool
     */
    protected function canShowByType(int $access_level): bool
    {
        // Hide notes if they are attached to private records
        $linked_ids = Database::prepare(
            "SELECT l_from FROM `##link` WHERE l_to=? AND l_file=?"
        )->execute([
            $this->xref,
            $this->tree->id(),
        ])->fetchOneColumn();
        foreach ($linked_ids as $linked_id) {
            $linked_record = GedcomRecord::getInstance($linked_id, $this->tree);
            if ($linked_record && !$linked_record->canShow($access_level)) {
                return false;
            }
        }

        // Apply default behaviour
        return parent::canShowByType($access_level);
    }

    /**
     * Generate a private version of this record
     *
     * @param int $access_level
     *
     * @return string
     */
    protected function createPrivateGedcomRecord(int $access_level): string
    {
        return '0 @' . $this->xref . '@ NOTE ' . I18N::translate('Private');
    }

    /**
     * Fetch data from the database
     *
     * @param string $xref
     * @param int    $tree_id
     *
     * @return null|string
     */
    protected static function fetchGedcomRecord(string $xref, int $tree_id)
    {
        return Database::prepare(
            "SELECT o_gedcom FROM `##other` WHERE o_id = :xref AND o_file = :tree_id AND o_type = 'NOTE'"
        )->execute([
            'xref'    => $xref,
            'tree_id' => $tree_id,
        ])->fetchOne();
    }

    /**
     * Create a name for this note - apply (and remove) markup, then take
     * a maximum of 100 characters from the first line.
     *
     * @return void
     */
    public function extractNames()
    {
        $text = $this->getNote();

        if ($text) {
            switch ($this->tree()->getPreference('FORMAT_TEXT')) {
                case 'markdown':
                    $text = Filter::markdown($text, $this->tree());
                    $text = strip_tags($text);
                    $text = html_entity_decode($text, ENT_QUOTES, 'UTF-8');
                    break;
            }

            [$text] = explode("\n", $text);
            $this->addName('NOTE', strlen($text) > 100 ? mb_substr($text, 0, 100) . I18N::translate('…') : $text, $this->gedcom());
        }
    }
}